181  H

Interrupt condition target setting range error

Mitsubishi Electric · MELSEC iQ-R I/O Module

What does 181  H mean?

An invalid value has been configured for 'Interrupt condition target setting [n]'. For an input module, the setting is outside the range of 0 to 3 and 7 to 10. For an output module, the setting is outside the range of 0 to 4 and 7. This prevents proper interrupt handling.

Common Causes

  • Incorrect value (outside 0-3, 7-10) set for 'Interrupt condition target setting [n]' on an input module.
  • Incorrect value (outside 0-4, 7) set for 'Interrupt condition target setting [n]' on an output module.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    For an input module, set 'Interrupt condition target setting [n]' to a value between 0 and 3 or between 7 and 10.

  2. 2

    For an output module, set 'Interrupt condition target setting [n]' to a value between 0 and 4 or to 7.

  3. 3

    Refer to page 93 of the manual for detailed information on 'Interrupt condition target setting [n]'.

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Verified technical data. Last updated: March 2026

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Source: Mitsubishi Electric MELSEC iQ-R I/O Module